Validators
XML Validator
Validate XML syntax and check for well-formedness errors. Get detailed diagnostics with line and column numbers to resolve markup issues quickly and ensure your data parses correctly.
Validate XML syntax and check for well-formedness errors. Get detailed diagnostics with line and column numbers to resolve markup issues quickly and ensure your data parses correctly.
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Best Practice
Always declare the XML encoding in the prolog to ensure correct character rendering across different systems.
Did You Know?
XML is strictly case-sensitive, unlike HTML, meaning <Author> and <author> are treated as completely different tags.
Tip
Use an XML formatter before validating large files to visually inspect the document structure more effectively.
Q: What does "well-formed" mean in XML? A: An XML document is well-formed if it follows the basic syntax rules, such as having a single root element and correctly nested, closed tags.
Q: Why is my XML failing even though the tags look correct? A: XML is strictly case-sensitive and sensitive to special characters. Check for case mismatches in tag names or unescaped ampersands.
Q: Does this validator check against a DTD or XSD? A: This tool currently focuses on syntax and well-formedness validation to catch common structural errors and invalid characters.
Best Practice
Ensure every attribute value is enclosed in double or single quotes to maintain document well-formedness.